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Discussion Starter #1
It's time for some new indoor arrows,I was thinking about 2512
cobalts with 160grn.points cut to maybe 30in .I'm shooting a ultra
tec,29in and 60lbs.I have some 2613 x7's with 180grn. points,but
only have five left, should I stick with them or the cobalts.
Thanks,Jeffrey
 

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jeffrey,
I don't know the axle length, so I guessed it at 40 inches also the brace so I left it at 7.75 inches. With 2512's, 30" long with 160 gr. pts. it showed in the green or middle but on the stiff side of the middle. The speed was 234 fps and the FOC was 11.5. The gr/lb. was 8.5. They should work fine. Hopes this helps.
Carroll
 

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Discussion Starter #3
Thanks Carroll,that help alot.ATA is 38 and brace is about 7 1/2.
Thanks,Jeffrey
 

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jeffrey,
by putting in 38" and 7 1/2 it moved a little toward the middle and the new numbers are, speed 236.84 and foc is 11.6. This would be a good choice. I shoot 2512 with the uni-bushing, 4" feathers, 29" long with 108 gr. nibbs anywhere from 55-63 lbs.
They fly great.
Carroll
 
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